Don't do it.
Step away from the bulk!
When getting sweatered up this winter, think about shape and fit. Just because it's winter, doesn't mean you have to stop looking good.
When the weather takes a dip, I look for sweaters that are thin, but made of something warm - merino wool, cashmere, etc.

J.Crew, $178 @ (cashmere)
Please ignore her ridiculous shorts. It's January, no shorts please.

J.Crew, $398 * (cashmere)
Ann Taylor, was $85, sale $39.99 @ (wool/silk/cashmere blend)

Loft, $49.50 (belt not included)
Banana Republic, was $175, sale $99.99 * (wool)
And just because it's winter doesn't mean you have to be afraid to bare your arms. Half sleeve sweaters are ultra chic and feminine.
J.Crew, $148 *@ (cashmere)
LOFT, $49.50 @
Ann Taylor, $78 @ (merino wool)
And, as always, don't forget the ruffles :)
Ann Taylor, was $88, sale $49.50*EWP fave
@Available in more colors